Double murderer who slaughtered little girl and her mother executed by lethal injection

Richard Knight was executed at Florida State Prison on Thursday for the murders of a pregnant woman and her four year-old daughter back in 2000 (Picture: Florida Department of Corrections)

The state of Florida has carried out its seventh execution of the year after a man convicted of murdering a pregnant woman and her young daughter back in 2000 was put to death by lethal injection.

47 year-old Richard Knight was pronounced dead at 6.13pm local time on Thursday at Florida State Prison. He had been sentenced to death over the killings of Odessia Stephens and four year-old Hanessia Mullings at a home in Coral Springs more than two and a half decades ago.

The case dates bac...